Design for manufacture and assembly, DFMA, is a set of tools or applications, when incorporated on a particular product helps reduce the number of parts ,bring about a change in the material used, and even the process/operation used. This indirectly helps in the overall cost reduction of the product and hence improve the productivity on the whole. DFMA is usually used during the initial design stages of a product, so that if any changes can be brought about in the product to help improve its efficiency and cost, simultaneously, it can be done in the beginning itself. This helps the designer plan out his entire schedule for production of the product depending on its work volume. DFMA is a combination of two basic principles, namely, Design for Manufacture (DFM) and Design for Assembly (DFA). Design for manufacture helps to ease out the manufacturing processes used in the production cycle of a product, whereas, Design for assembly helps ease out the assembly line once done with the production stage. Improper design decisions are responsible for higher manufacturing cost for a product. Thus it is important to include DFMA by combining principles of both DFM and DFA principle early in the design process. This paper presents a case study of the manufacturing and assembly cost's estimation during the design stages of a hand pressure mob, with the help of a DFMA tool.